Three college friends of Boston Marathon bombing suspect Dzhokhar Tsarnaev were arrested and accused Wednesday of removing a backpack containing hollowed-out fireworks from Tsarnaev’s dorm room three days after the attack to keep him from getting into trouble.

Boston Marathon bombing suspect Dzhokhar Tsarnaev lay hospitalized in serious condition under heavy guard Saturday as people around the city breathed easier and investigators tried to piece together the who and why of the deadly plot.

A 19-year-old Massachusetts college student wanted in the Boston Marathon bombing was captured hiding out in a boat parked in a backyard Friday night and his older brother lay dead in a furious 24-hour drama that transfixed the nation and paralyzed the Boston area with fear.